Last year, I took a couple of Landscape Architecture classes. I had to buy lots of vellum for all of the projects we had to do. So as a result I have lots left, in all different sizes. I won't be taking anymore L.A. classes, so what am I to do with all of it. I don't just want to throw it away, because it is pretty pricey. I found this on Pinterest and would love to do something like it. What else could I do though? Any suggestions?